• UL Recognition

• Removable Scales

• Taut Band Mechanism standard

• Phenolic Fronts

• Glass Windows

• Three choices of mounting: lens, surface or bezel

• Proven reliability - accurate measurement & display

• Wide selection of Ranges

• Optional illumination

• Customized Scales available

The 7000 Series meters provide quick-change versatility. Many different variables can be measured on one meter by simply switching the meter's scale and using a different multiplier or shunt compatible with the new scale. A few basic ranges and a supply of interchangeable dials make the 7000 Series an inexpensive equivalent of many single meters.

• Long Scale

• Low profile, thin front

• Rugged, Stylish Case

• Customized Scales available

• Integral Bezel models

• Built-in illumination window

• Wide selection of Ranges

• Customized Scales available

Black Phenolic panel meters are rugged, stylish, sensitive and accurate. They range in size from 3 1/2" to 5 1/2" and can be either front or bezel mounted. Their rugged designs are particularly suitable for use in demanding environments. The Black Phenolic panel meters have a standard indication accuracy of ±2% full scale for DC ranges (±3% for AC ranges) and are available with "Super Calibrated Accuracy" of ±0.5% for exacting measurement requirements.

The Model 426 is a versatile panel meter with a low-profile thin front. It has a scale approximately equivalent to that of a conventional 4 1/2" meter, but the dial area height is the same as that of a 3 1/2" meter. The Model 426 requires no more panel space than other meters with shorter scales. Designed so that it is equally attractive and practical whether mounted in front of a panel or recessed, the Model 426 has found immediate acceptance in today's narrow rack panels.

Meter Relay Specifications  *

 *   Except as noted, the above specifications cover the meter-relay function only - i.e., all values given for accuracy, repeatability, etc., are exclusive of basic meter performance.

• Plug-in control module

• Long life lamp operation

• Plastic front and base

• Proven optical setpoints

• On/Off or alarm control

The 195 Series Meter-Relays contain an exclusive light sensitive transistor switch that provides the ultimate in control simplicity and reliability. This switch controls the load relays. There are no pointer contacts or mechanical interference in the meter mechanism. The controllers are supplied with a plug-in control module that mounts directly on the rear of the Meter-Relay or may be remotely mounted with an accessory cable.

Meter Relay Specifications  *

• On-Off or Alarm Control :
  • Each Meter-Relay is engineered for On-Off (automatic reset) control action. For alarm latching (manual reset), simply remove jumper wire from terminals at rear of control module and substitute a normally open momentary switch.
• 117 Volt AC operation :
  • No special power supply needed . . . simply connect to 117 volt, 50 or 60Hz source
• Long Lamp Life :
  • Because the lamp is operated at well below rated voltage, life expectancy is conservatively rated at 5 years (typical).
• Safe Operation :
  • In the event of component failure or loss of control power, energized setpoint relays immediately de-energize.
• Control Mounting Module :
  • Rear mount standard. May be remotely mounted using accessory kit.
• Setpoint Coincidence :
  • +/- 2% of full scale at 117VAC input power (maximum difference in indications of setpointer and indicating pointer when control action occurs.
• Repeatability :
  • 0.3 percent of full scale
• Setpointer Travel :
  • 100 percent of full scale travel: double setpointers can be positioned to within 2 mechanical degrees of each other - approximately 2.2% of full scale.
• Minimum Span :
  • 0-20 micro Amp
• Input Power :
  • 117VAC +/- 10% , 50/60Hz. 7.0 Volt Amperes maximum
• Load Relay :
  • DPDT per setpoint
• Contact Rating :
  • 5 Amperes AC non-inductive at 120 Volts
  • 5 Amperes DC non-inductive at 28 Volts
  • 0.2 Amperes DC non-inductive at 125 Volts

 *   Except as noted, the above specifications cover the meter-relay function only - i.e., all values given for accuracy, repeatability, etc., are exclusive of basic meter performance.

• UL Recognized with suffix "KU"

• Temperature & non-temperature models

• Continuous indication

• Infinite noise rejection

• Easy installation - all connections at rear terminals

• Solid-state circuitry

• Single and double setpoints

• Rectangular & stackable edgewise models

• Customized Scales available

Optical Compack Controllers operate on an optical principle associated with the meter mechanism. A light source (incandescent lamp) and a photo-resistive cell combination are positioned by the setpoint mechanism. An opaque vane is attached to the meter mechanism so that when the indicating pointer reaches the setpoint the vane intercepts the light from the source, causing a sharp change in resistance of the photocell. The resistance change is used to actuate a relay driver circuit for control of an external load. The response characteristics of D'Arsonval mechanisms automatically provide filtering of the input signal, making Compack Controllers immune to line noise and transient surges. Optical type controllers are the best choice for applications in electrically noisy environments.

• Custom Dials

• Super Calibrated Meters (DC Ranges only) Class I, II, II, & IV

• Special Resistance

• Alternate Mounting

• Special Pyrometers

• Special Ranges

• Zero Adjust

Magnetic-contact meter-relays offer the simplest but still positive control action in the field of electro-mechanical devices. They are especially suitable for applications where only low voltage is available across the meter but a reliable contact must be made and held at setpoint. Usually an alarm is actuated or an opening mechanism is shut down.

When the moving element contacts of a magnetic-contact meter-relay close at setpoint, auxiliary contact pressure is provided by small permanent magnets to ensure a low resistance contact circuit. Unlocking is accomplished by mechanically resetting the contacts.

Locking-Coil meter-relays are essentially d'Arsonval meter mechanisms with setpoint arms and contacts. The locking coil of the meter-relay is an integral part of the signal coil and is wound with the signal coil as part of the meter-relay's moving element. The locking coil is energized when the indicating pointer reaches the setpoint. Torque produced by the locking current drives the contacts together and holds them firmly together to create an excellent low resistance control circuit. The way that LFE/api locking coil contacts open is another reason for their consistent performance. The meter relays are designed so that the contacts open only after the locking coil circuit has been broken. A small spark is produced when the contacts "make". This keeps them free from pitting while a wiping motion on each "make" and "break" keeps them clean.

The LFE/api locking-coil meter-relay is an extremely simple and stable device to apply in limit control applications. It indicates as well as controls. No readout circuitry is needed in the control system, and precise control with indication is provided at moderate cost. Only three basic components are required for the system: a high or low setpoint locking-coil meter-relay, a load relay and a DC power source. A double setpoint control system is hardly more complicated; it requires only a LFE/api double setpoint meter-relay and an extra load relay.

• High, Low or Double setpoints

• Continuous indication

• Requires minimum depth behind panel

• For use with separate control module or user supplied circuit

• Smooth vernier control of setpoints

• Available with either Taut Band or Pivot-and-Jewel

LFE/api Optical "L" Meter-Relays provide the most comprehensive range of non-contacting control and display instruments available today. This meter-relay uses the same meter and setpoint components supplied in the "K" Series Meter-Relays except that the meter and the corresponding control module may be separately mounted allowing the meter portion to fit in control boxes with shallower depth.

Optical Meter-Relays provide one or two visible setpoints as well as precise meter indication of the control variable over the entire scale. Velvet-drive control knobs provide vernier reduction for precise setpoint adjustment (except on Model 371-L). Double setpoints are controlled by two separate knobs, eliminating operator confusion.

The low torque instruments are all supplied with taut band mechanisms standard while the high torque instruments are normally pivot-and-jewel mechanisms with taut band optional.

• High, Low or Double setpoints

• Continuous indication

• Requires minimum depth behind panel

• For use with separate control module or user supplied circuit

• Smooth vernier control of setpoints

• Available with either Taut Band or Pivot-and-Jewel

LFE/api Optical "L" Meter-Relays provide the most comprehensive range of non-contacting control and display instruments available today. This meter-relay uses the same meter and setpoint components supplied in the "K" Series Meter-Relays except that the meter and the corresponding control module may be separately mounted allowing the meter portion to fit in control boxes with shallower depth.

Optical Meter-Relays provide one or two visible setpoints as well as precise meter indication of the control variable over the entire scale. Velvet-drive control knobs provide vernier reduction for precise setpoint adjustment (except on Model 371-L). Double setpoints are controlled by two separate knobs, eliminating operator confusion.

The low torque instruments are all supplied with taut band mechanisms standard while the high torque instruments are normally pivot-and-jewel mechanisms with taut band optional.

• Variety of control functions

• 3 foot cable for connection to Meter-Relay

• 12, 24 or 28 VDC supply optional

• DPDT Output Relays optional

Optical meter relays provide a resistance change at setpoint. Before they can provide a high-level control function, a control module is required. LFE/api control modules are available with the following control functions: On/Off (also used for limit or cycling control applications), time proportioning relay, SCR phase fired pulse and 3-zone control. The 3-zone control module contains two relay outputs to provide relay closures when the measurement signal exceeds the limits of the dead band at a single point.

Modules can be used with single or double setpoint meter relays for control applications using temperature, current or voltage sources. Because the module is mounted remotely from the meter relay, valuable space behind the panel is saved. The module is connected by plug-in cable to the Optical Meter Relay. The standard cable length furnished with the module is three feet. Lengths up to twelve feet are optionally available.

• High, Low or Double setpoints

• Continuous indication

• Requires minimum depth behind panel

• Standard Range: 0-1 mADC Pivot-and-Jewel High Torque (other ranges available)

• Standard Tracking Tolerance is 1% of Full Scale

• Zero right, zero center, zero off-center

• Optional sensitivities available

• Linearity (tracking) to 0.5%

• Accuracy to ±1% of full scale.

• Custom dials s Black mounting bezel for Model 371-P.

• Rubber gaskets

These setpoint meters incorporate a special potentiometer with setpoint arms adjustable over the scale of a panel meter to provide a good visual comparison of the measured variable relative to the setpoint. The potentiometer element and the setpoint wipers are brought out in a small 9-pin connector for easy connection to the user's external signal conditioning amplifiers and comparators.

• High, Low or Double setpoints

• Continuous indication

• Requires minimum depth behind panel

• Standard Range: 0-1 mADC Pivot-and-Jewel High Torque (other ranges available)

• Standard Tracking Tolerance is 1% of Full Scale

• Zero right, zero center, zero off-center

• Optional sensitivities available

• Linearity (tracking) to 0.5% s Accuracy to ±1% of full scale.

• Custom dials s Black mounting bezel for Model 371-P.

• Rubber gaskets

This setpoint meter incorporates a special potentiometer with setpoint arms adjustable over the scale of a panel meter to provide a good visual comparison of the measured variable relative to the setpoint. The potentiometer element and the setpoint wipers are brought out in a small 9-pin connector for easy connection to the user's external signal conditioning amplifiers and comparators.

• Simple contact circuit for limit control

• No amplifiers required

• Wide range of models and styles

• Available to match Analog Panel Meter Series

Locking-Coil meter-relays are essentially d'Arsonval meter mechanisms with setpoint arms and contacts. The locking coil of the meter-relay is an integral part of the signal coil and is wound with the signal coil as part of the meter-relay's moving element. The locking coil is energized when the indicating pointer reaches the setpoint. Torque produced by the locking current drives the contacts together and holds them firmly together to create an excellent low resistance control circuit. The way that LFE/api locking coil contacts open is another reason for their consistent performance. The meter relays are designed so that the contacts open only after the locking coil circuit has been broken. A small spark is produced when the contacts "make". This keeps them free from pitting while a wiping motion on each "make" and "break" keeps them clean.

The LFE/api locking-coil meter-relay is an extremely simple and stable device to apply in limit control applications. It indicates as well as controls. No readout circuitry is needed in the control system, and precise control with indication is provided at moderate cost. Only three basic components are required for the system: a high or low setpoint locking-coil meter-relay, a load relay and a DC power source. A double setpoint control system is hardly more complicated; it requires only a LFE/api double setpoint meter-relay and an extra load relay.

• Simple contact circuit for limit control

• No amplifiers required

• Wide range of models and styles

• Available to match Analog Panel Meter Series

Locking-Coil meter-relays are essentially d'Arsonval meter mechanisms with setpoint arms and contacts. The locking coil of the meter-relay is an integral part of the signal coil and is wound with the signal coil as part of the meter-relay's moving element. The locking coil is energized when the indicating pointer reaches the setpoint. Torque produced by the locking current drives the contacts together and holds them firmly together to create an excellent low resistance control circuit. The way that LFE/api locking coil contacts open is another reason for their consistent performance. The meterrelays are designed so that the contacts open only after the locking coil circuit has been broken. A small spark is produced when the contacts "make". This keeps them free from pitting while a wiping motion on each "make" and "break" keeps them clean.

The LFE/api locking-coil meter-relay is an extremely simple and stable device to apply in limit control applications. It indicates as well as controls. No readout circuitry is needed in the control system, and precise control with indication is provided at moderate cost. Only three basic components are required for the system: a high or low setpoint locking-coil meter-relay, a load relay and a DC power source. A double setpoint control system is hardly more complicated; it requires only a LFE/api double setpoint meter-relay and an extra load relay.

• DC Current and Voltage

• AC True RMS Current and Voltage

• Frequency

• Temperature - Thermocouple & RTD

• High-intensity, .56" Red LED Display

• Fits in DIN and NEMA cutouts

• Screw terminals standard

• Snap-in case - no tools required

• Price competitive