Dwyer 4380 - Manual (Page 2)

Input Programming
The input selection and ranging is performed through two switch banks. Refer to the instructions below
and the illustration in Figure 3 for details.
MODE SELECT SWITCH BANK
1. For CURRENT INPUT turn switch one ON.
For VOLTAGE INPUT turn switch one OFF.
2. For UNI-POLAR INPUT (low end of scale ≥ zero) turn switch two ON and turn switch three OFF.
3. For BI-POLAR INPUT (low end of scale < zero) turn switch two OFF and turn switch three ON.
4. For ZERO BASED INPUT (eg. 0 to 20 mA) turn switch four ON and turn switch five OFF.
5. For ZERO SUPPRESSION (eg. 4 to 20 mA) turn switch four OFF and turn switch five ON.
6. For DIRECT ACTING INPUT turn switch six OFF.
7. For REVERSE ACTING INPUT turn switch six ON and reverse input wiring.
RANGE SELECT SWITCH BANK
Turn ON the switch for the scale desired. All other switches should be OFF. If BI-POLAR INPUT is
selected, the scale will be MINUS-SELECTION to PLUS-SELECTION (eg. -10 TO ±10 VDC).
WARNING: Do not attempt to operate or calibrate this device with the cover removed.
Potentially lethal voltage is present on some of the internal components. Make sure that
the cover is firmly in place before plugging into the socket.
Figure 3: Input selection and range switches