OPERATING INSTRUCTIONS
CHECK 1-5 VOLT INPUTS
WITHOUT DISCONNECTING WIRES
Most 1-5 Volt receivers in 4-20mA loops have a 250 Ohm resistor across the input of the receiver. This resistor may be mounted internally or externally. TechChek 830-KP is connected directly across the input of the 1-5 Volt receiver without disconnecting any field wiring. This saves a great deal of time when a large number of voltage receivers, such as chart recorders or computer systems, require calibration.
Make certain that changing the signal input will not disturb the process or cause unexpected alarms when checking on-line instruments. It is important to remember the 830-KP drives only the device to which it is connected. It has no effect on other devices in the 4 to 20 mA loop. TechChek 830-KP will clamp the selected value in the mV and V Ranges to the maximum source or sink current of >16 mA.
1)Press the MILLIAMP/V push-button until V or mV appear on the display
2)Press the DISPLAY/SOURCE/READ push-button until SOURCE and V or mV appear on the display
3)Press the TYPE/ENG UNITS push-button once to switch between V and mV on the display
4)Connect the red SOURCE lead of the calibrator to the plus (+) input of the device and the black SOURCE lead to the minus (-). Any associated 250 Ohm resistor must not be disconnected.
