• Simple to re-calibrate if necessary
  
• No batteries to go dead
  
• Simple jumper change for scale range
  
• Jumper change for decimal points
  
• Low drift high accuracy
  
• Optional backboard has screw terminals and provides configurations listed below
  
• For back board order M705
  

To measure current, the VM-1 basic meter is ordered with the current input back board as # M700. Not included is the appropriate current shunt. Refer to the price list for shunts. The back board has screw terminals and a power supply that isolates the VM-1 from the power supply.

To measure AC Volts, the VM-1 basic meter is ordered with the AC rms converter back board as #M710. The jumpers on the VM-1 set the range and decimal points. The back board has screw terminals and a power supply that isolates  the VM-1 from the power supply.

To measure AC Amps, the VM-1 basic meter is ordered with the AC rms converter back board as # M720. The jumpers on the VM-1 set the range and decimal points. The back board has screw terminals but does not need the isolator power supply since the current transformer used for sensing isolates the VM-1 unless the current shunt is used.*

To measure AC hertz or frequency, order the VM-1 basic meter with the AC hertz converter back board. The back board has screw terminals and a power supply that isolates the VM-1 from the power supply. 

High Temperature  Thermocouple Amplifier with Readout for chromel alumel probes

• No batteries to go dead
  
• VM-1 backboard has built-in power supply for remote pyro amplifier
  
• Low drift high accuracy
  
• Remote thermocouple amplifier
  
• Built-in ice point junction
  

• Available in degrees C or F
  
• Connects to any DC voltmeter or VM-1 Price $25
  

• 100 Amps (200 Amps peak)
  
• Optional 1000 Amps (2000 Amps peak)
  
• Connects to any DC voltmeter or VM-1