Extech Instruments PRC50 User Manual page 5

4.2 Keys
Figure 3 lists the calibrator's function keys and Table 3 explains their use.
Table 3 – Function Key Descriptions
No. Name
1~5 Source value set keys
6~10 Source value set keys
11 MODE key
12 ON key
13 Power key
14 Backlight
V Key
15
16 PULSE Key
17 mA Key
18 FREQ Key
19
Key
20 RANGE Key
21 UNIT Key
22 LOOP key
23 ZERO Key
24 START Key
25
Key
26
25/100% Key
6 7 8
3
1 2
11
13
15
17
19
21
23 25
Figure 3 – Calibrator Function Keys
Function
Increment source set point
Decrement source set point
Mode key (press to change the function mode)
Switch ON/OFF measurement/ source function
Switch ON/OFF power
Switch ON/OFF backlight
Select measurement/source DCV function
Select source pulse function
Select measurement/source mA function
Select measurement/source FREQ function
Select measurement continuity function
Select measurement/source range; mA /percentage toggle key
not used
Switch ON/OFF 24V Loop power
Set the source value to its default value;
In pulse source function, set the pulse value
Source auto-pulse value;
Switch ON the mA auto-stepping or sweeping function;
HOLD (freeze) the measured value;
In DCmA source function ,select the auto-wave type;
In frequency or pulse source, set the frequency value.
In mA source function, select 25% or 100% manual step output type;
In pulse number mode, frequency source, set the amplitude value;
Measure the average value.
9 10
5
4
12
14
16
18
20
22
26 24
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