HT instruments HT7052 - Manual (Page 11)

HT7052
EN - 9
Auto-calibration prevents the reduction in accuracy when measuring very low currents. It
compensates the effects caused by ageing, temperature and humidity changes etc. A new
auto-calibration is recommended when the temperature changes by more than 5
C. If the
instrument detects an incorrect state during the autocalibration, the following warning
message will be displayed:
CAUTION
 TEST LEADS CONNECTED: DISCONNECT AND SWITCH ON THE
INSTRUMENT AGAIN
 CONDITIONS OUT OF RANGE: PRESS START TO CONTINUE
Possible reasons for out of range conditions are excessive humidity, excessively high
temperature, etc. In this case it is possible to perform measurements by pressing the
START/STOP button again but results could be out of technical specification
5.2 CONFIGURATION AND SETUP OF SYSTEMS PARAMETERS
The configuration and setup function enables the selection and adjustment of the
parameters (see Table 1) that are not directly involved in the measurement procedure (see
Fig. 5 and Fig. 6). In the lower section of the display the power supply status is shown
Fig. 5: Configuration menu Fig. 6: Setup menu
PARAMETERS VALUE DESCRIPTION
Memory clear Clear all memory locations
Filter Fil1, Fil2, Fil3, Fil0 Selection of noise rejecting filter (see § 6.3)
DIAG. Starting
time
0%…90%
Adjustment of start of the timer in the
DIAGNOSTIC TEST functions, according to the
nominal voltage Unominal. See additional
explanation in § 6.1)
Contrast 0%…100% Adjustment of the LCD contrast
Time Set real time (hour: minute)
Date Set current date (day-month-year)
COM port
RS232 2400, RS232 4800,
RS232 9600,RS232 19200,
USB 115000
Set communication mode and rate
Language Ita, Eng, Esp, Deu Set system language
Initialization
For internal factory and service maintenance
only
Table 1: Configuration of system parameters
1. Use  and  arrows to select parameter (line) to be adjusted
2. Use  or  arrows to change the value of the selected parameter. If there are two or
more sub-parameters in one line (e.g. date and time) then use the SELECT key to skip
to the next sub-parameters and back
3. Press the ESC key to exit from configuration and back to the main menu