Series 1700 Gas Detector

DESCRIPTION

The Series 1700 is a fast-acting, fail safe detector of Chlorine or Sulfur Dioxide gas. It accurately covers the range 0-30 parts per million (ppm) of the gas in air. The 1700 Gas Detector is sensitive yet sturdy enough to operate reliably across a wide range of temperatures and humidity and in local and remote industrial applications, such as water and wastewater treatment plants.

The Series 1700 is a compact system that is weatherproof and includes an electrochemical Gas Sensor and a microprocessor-based Alarm Indicator Unit, both designed for wall mounting.

FEATURES

Gas Sensor

The Series 1700 sensor is housed in a weatherproof enclosure with an LED to indicate that power supply is present. The sensor is stable and practically maintenance free. Its cell is designed to provide trouble free performance throughout its life and can be replaced easily. The sensor is a high resolution transducer that reacts quickly to changing levels of ambient gas, transmitting a proportional 4-20mA signal to the alarm indicator. A second point sensor may be provided as an option, for local or remote installations.

ALARM INDICATOR UNIT

On the Alarm Indicator panel, the gas type followed by its ppm value is shown at one second intervals on an eight digit LCD. Simultaneously, the gas level is indicated on an LED bar graph. Any alarm condition is signaled by an audible and visual alarm, and its source identified on the LCD display. The LCD also indicates whether the audible alarm is operative and facilitates the alarm setting procedure. A 12V battery, built into the Alarm Indicator, provides back-up power in case of main power supply failure.

ALARM SETTINGS

There are five alarm conditions : 1-Low, 2-High, 3-Critical, (all three of which may be selectable between 0.1-29.9ppm), 4-Sensor Failure Alarm, 5-Power Supply Failure. The Alarm set-up is achieved simply via the Alarm Indicator’s keyboard and stored in the EEPROM memory. The memory is secure until overwritten regardless of main power or battery power status. To test or clear alarms there is a simple verify and cancel procedure.

TECHNICAL DATA

GAS SENSOR

TYPE:

Cl2 or SO2 three electrode fuel cell with transmitter housed in weatherproof enclosure.

RANGE :

Auto range 0-10/0-20/0-30 ppm CL2 Or SO2 in atmosphere.

OPERATING TEMPERATURE:

0-55 °C.

OPERATING HUMIDITY:

0-99 non condensing.

OPERATING PRESSURE:

Ambient +/- 10%.

OUTPUT:

4.20mA proportional to CL2 Or SO2 concentration.

ACCURACY DRIFT:

+/- 2% Full Scale Drift/Month.

SENSITIVITY:

0.1 ppm

REPEATABILITY:

2% (Clorine) 1% (Sulfur Dioxide)

SENSOR WARRANTY:

1 year

DIMENSIONS :

Width 4-3/4″ (120mm) x Depth 4-3/4″ (120mm) x Height 3-9/64″ (80mm).

CONNECTED CABLE :

Four conductor shielded cable to alarm unit. 6 feet standard cable length. Maximum overall cable length between sensor and alarm indicator is 650 feet.

ALARM INDICATOR UNIT:

CASE

Polycarbonate enclosure with a clear door.

DISPLAY :

Eight digit LCD shows monitoring/system status, LED bar graph indicates gas level.

ALARM WARNINGS :

Alarms are indicated visually by a red LED, and audibly by a repetitious alarm emiting 70-90db@3’.

ALARM SETTINGS:

Low alarm minimum –0.1 ppm.
High alarm maximum –29.9 ppm.
Critical alarm minimum – same as high alarm.
Sensor failure alarm – input from sensor has fallen below 3.5mA.
Power supply alarm – main power failure : system operating from battery.

ALARM CONTACT:

Relays are configured to be normally open. Relays are rated for 30 vdc/250 vac/5 amp.

SET-UP CONTROLS:

Five keypad, toggle action membrane ; “Mode”, “Up”, “Down”, “Alarm”, “Accept”.

OUTPUT:

4-20mA isolated into maximum impedance of 1.0 K ohms.

POWER SUPPLY:

110/200vac, 15vac maximum. Optional battery : 12vdc provides 12 hours power supply when fully charged.

DIMENSIONS:

Width 7-7/8” (200mm) x Depth 6-11/16” (170mm) x Height 8-1/4” (210mm).

ALARM INDICATOR WARRANTY:

1 year