Viatran IDP10-A, Инструкция по установке, калибровке и эксплуатации

Страница: 38 / 53

[38]
98MANALIDP10AV Rev. A 8/16/11
Zero Adjustment Using External Zero Button
An optional external zero adjustment mechanism in the electronics housing (see Figure 21) allows
local “re-zeroing” of the transmitter output without having to remove the electronics compartment
cover. The mechanism is magnetically activated through the housing wall to prevent moisture
from entering the enclosure. Zeroing is accomplished when the external zero button is depressed.
On the IDP10-A or IDP10-V transmitter, the external zero button does a CAL AT0
calibration (at zero differential pressure). To use this feature:
1. Unlatch the external zero button by turning it 90 ° in a counterclockwise direction so
that the screwdriver slot lines up with the two holes in the face of the adjacent part.
Do not push the button in with the screwdriver while doing this.
2. On the IDP10-A or IDP10-V transmitter, press the button with zero differential
pressure applied to the transmitter or the bypass valve open and the transmitter at
a non-zero static pressure.
3. The display indicates ZEROED . If EX ZERO is disabled, or the transmitter is
not online, the display reads BAD KEY .
4. If additional re-zeroing is required, wait 20 seconds and repeat Step 2.
5. Re-latch the external zero button by turning it 90 ° in a clockwise direction to prevent
accidental pressing of the button. Do not push the button in with the screwdriver
while doing this.
Configuration
You can access the Configuration mode by the same multi-level menu system that was used to
enter Calibration mode. Entry to the Mode Select menu is made (from normal operating mode)
by pressing the
Next button. The display reads CALIB , the first item on the menu. Press the
Next button again to get to the second item on the menu, CONFIG . Acknowledge your choice
of this selection by pressing the Enter button. The display will show the first item in the
Configuration menu. You can then configure items shown in Table 3 for the IDP10-A or
IDP10-V transmitter. The initial factory configuration is also given in these tables.
Table 3. IDP10-A or IDP10-V Configuration Menu
Item Description
Initial Factory
Configuration(a)
EX ZERO External zero; enable or disable
Disable
OUT DIR Output direction; forward or reverse Forward
OUTMODE Output; linear or type of square root Linear
OUTFAIL Fail mode output; low or high High
DAMPING Damping; none, 2-, 4-, or 8-seconds None