Ability to interface up to four binary inputs. The binary inputs are compatible with either open collector or mechanical contacts. The binary inputs can supply power to the four inputs or accepts powered outputs from external devices. These inputs can be used with level switches, flow switches, pressure switches or other devices.
The inputs can be used to directly control the relays of the 9950 or can be used in combination with the measurement readings for advanced control of your process.
The Signet pH buffers are ideal for many calibration requirements. The liquid solutions are conveniently packaged in one pint bottles; the powder pillows are packaged in low weight, single-use containers which can be mixed with water. All pH buffers are color coded for easy identification; 4.01 pH is red, 7.00 pH is yellow, and 10.00 pH is blue.
The pH buffers are traceable to NIST standards and certificates are available upon request. They are accurate to within ± 0.01 pH units @ 25 °C and have long term stability.
These solutions are temperature sensitive and are provided with temperature correction values for the most accurate calibration. For applications that require ORP calibration, the pH 4 and pH 7 buffers can be mixed with quinhydrone powder for the correct measurement values of 87 mV and 264 mV respectively.
The Signet i-Go 8058 Signal Converter accepts any 4 to 20 mA signal and converts it into the Signet digital (S3L) format, the serial data format used by the Signet 8250, 8350, 8450 and 8900 instruments. When used with the 8900 Multi-Parameter Controller, the measurement type and operating range are defined in the 8900 setup menu.
When used with level, temperature and pressure transmitters, the 8058 is configured at the factory to the user's specifications. The wire-mount single-channel version is easily mounted anywhere in the interconnecting wiring between the sensor and the instrument.
The DIN rail mounted dual-channel version can convert one or two separate 4 to 20 mA inputs into a digital (S3L) output.
The 8059 External Relay Modules supplement the output capabilities of certain host instruments such as the 8900 Multi-Parameter Controller. AC-powered versions accept universal line voltage, and also provide 24 VDC output that can be used to power the host instrument or other device(s). The host instrument controls relay operation by way of a single digital (S3L) connection. The compact plastic housing is DIN rail mountable and includes LED annunciators for each relay, plus one each for power-on and data transfer or test mode.
The Signet 2759 pH/ORP Simulator is a battery-powered millivolt generator that simulates pH values of 4, 7 and 10, plus ORP values of ±700 mV. This device is useful as a troubleshooting aid and for general verification of system operation. It is not a substitute for periodic system calibration with pH buffers or test solutions.
Accessory adapter cables (sold separately) enable the 2759 to connect directly to Signet 2760 preamplifiers, or 2750 pH/ORP Sensor Electronics. The adapters include a selector switch for pH (3K or PT1000 Temperature Compensation) or ORP simulation. The switch triggers automatic sensor recognition software in Signet pH/ORP instrumentation.
The Signet Conductivity/Resistivity Tools are available for certification or validation of electronics that are independent of the electrode. Because there are no available liquid standards for calibration in low conductivity and resistivity applications, these tools are ideal for various installations. All tools are built to conform to the ASTM D 1125-95 Standard (Standard Test Methods for Electrical Conductivity and Resistivity of Water), which is also commonly used for USP 24 applications.
Signet tools simulate, within ±0.1% precision (accuracy), various values: 1.0 μS, 2.5 μS, 10.0 μS, 10.0 MΩ, 18.2 MΩ. These tools also temperature compensated to 25 °C and enable the user to accurately validate or certify the electronics.
The 2850-101-X simulators are used with the Model 9900 and Model 2850 electronics by simply plugging into the same terminals as the sensor cables.