| Operation |
Eight channel
microprocessor based monitor and controller. Two channels
provided in the base unit. Plug-in PCB cards for each
additional channel. Programmed instruction-set includes
channel set-up; setting high & low alarm limits for
each channel and common alarm; auto-calibration of oxygen
channels; and numerous units of measurement such as: mg/l,
%Sat, °C/°F, pH, ppt, mmHg. Up to 8 digital inputs
(DI) activate common alarm; DI can be configured to display
a variety of alarm messages such as "low level",
"high level", "no power", "no
flow", "low O2 pressure". |
| Data
Logging & PC Connectivity |
Communication package enables
RS232 or RS485 connection to a PC for viewing the displayed
values and for downloading data from the PT4's internal
memory. Data transmission is ASCII comma seperated (CsV)
format. Data logging capability, for all active channels,
with selectable log interval (3 sec. to 18hrs). Data stored
in internal (32K) non-volatile memory. Logging capacity
depends on configuration. From 4000 single channel time-stamped
recordings to 320 recordings for all 8 channels including
ave., max., min values per recording. selectable averaging
window, from 2 seconds to half log interval. |
| User Interface |
|
|
| Display |
4 line X 20
Character LCD with 9 mm high characters with back light. |
| Indicators |
Instrument
status light (bi-color). 8 alarm lights, one for each
channel, common alarm light |
| Audible
Alarm |
Audible alarm: Built-in
buzzer sounds when common alarm is active. |
| Keypad |
1 x 5 tactile keypad includes
On/Off switch. |
| Inputs |
Up to eight, 2-wire terminals
for direct connection of oxygen and temperature probes
(0-250 mV) or from 4-20 mA transmitters. Each channel
galvanically isolated. Measured with 15-bit resolution.
Up to eight digital inputs. |
| Outputs/Relays (optional) |
|
|
| 4-20
mA output |
Scalable and
invertible; max load 500 ohms; non-isolated. 0.08 mA resolution.
|
| Relays |
Up to 10 relays,
1 per channel SPDT contacts, 8amp 30V DC/ 10 amp 250 V
AC resistiveload, and 2 common alarm DPDT contacts, 10amp
30V DC/250 V AC resistive load. Relays can be pre-wired
energised 12V DC or as dry contacts. User selectable Fail
Safe - normally. Open (NO)/NC modes and common alarm relay
can be cancelable or not. Alarm and corresponding relay
is active if the channel value is greater than or less
than user selectable values for at least the selected
delay time (0-999 minutes). Relays available separately,
in bank of 4 plus common alarm, bank of 5, or bank of
8 with 2 common alarm relays. |
| Power |
12V DC (-1
+2) |
| Mechanical
Specifications |
|
|
| Monitor |
Polycarbonate, watertight,
with plastic laminated front label. |
| Dimensions |
120 mm H x 200 mm W x 90
mm D, (4-3/4" x 7-7/8" x 3-1/2") |
| Powder coated
mounting bracket supplied, adjustable mounting pedestal
optional. |
| Junction
Box |
Size and number depend
upon system configuration |
| Standard |
PVC NEMA 4X (IP66) |
| Dimensions |
127mm H x 127 mm W x 51 mm D, (5"
x 5" x 2"). |
| Extended (standard) |
Polycarbonate NEMA 4X (IP66) |
| Dimensions |
120 mm H x 200 mm W x 90 mm D, (4-3/4"
x 7-7/8" x 3-1/2"). |
| Extended (Long) |
Polycarbonate NEMA 4X (IP66) |
| Dimensions |
120 mm H x 240 mm W x 100 mm D, (4-3/4"
x 9-1/2" x 4"). |
| Small |
Polycarbonate NEMA 4X (IP66) |
| Dimensions |
120 mm H x 160 mm W x 90 mm D, (4-3/4"
x 6-1/4" x 3-1/2"). |
| Operating
Conditions |
|
| Operating
Temp. |
-5°C to 50°C (23°F
to 120°F). |
| Relative
Humidity |
90% max. with no condensation. |
