Additel 761A Series Automated Pressure Calibrator Kit
Key specifications
| Parameter | 761A Series |
|---|---|
| Maximum pressure | 1,500 psi / 100 bar |
| Lowest range | ±30 inH₂O / ±75 mbar on LLP version |
| Accuracy | Up to 0.01% FS |
| Control stability | Up to 0.003% FS |
| Pressure types | Gauge, absolute, differential depending on model |
| Internal modules | 2 removable pressure modules on most models |
| External modules | Supports 2 external pressure modules |
| Display | 7″ color touchscreen, 800 × 480 |
| Battery | Rechargeable Li-ion, typically 8 hours |
| Data storage | >8 GB |
| Data logging | Up to 1,000,000 time-stamped readings |
| Communications | USB, LAN, Ethernet, Wi-Fi, Bluetooth |
| HART / PROFIBUS | Supported |
| Weight | <7.95 kg |
| Dimensions | 299 × 193 × 192 mm |
| Enclosure | IP31 |
Available pressure versions
The 761A is a series rather than one fixed-range instrument, so the exact kit configuration matters:
- 761A-LLP — ±30 inH₂O / ±75 mbar, for low-pressure and differential applications; accuracy 0.05% FS.
- 761A-D — approximately −13.5 to +35 psi / −0.95 to +2.5 bar, differential/gauge; accuracy 0.02% FS.
- 761A-500 — vacuum to 500 psi / 35 bar.
- 761A-1K — vacuum to 1,000 psi / 70 bar.
- 761A-1.5K — vacuum to 1,500 psi / 100 bar.
- 761A-BP — 100–1,200 hPa for barometer calibration, with 0.01% FS accuracy.
For the 500/1K/1.5K versions, the high-pressure module can be combined with a selectable lower-range internal module. This is useful when one calibrator needs to cover both relatively low and high pressure instruments.
Electrical calibration capability
The 761A isn’t only a pressure source. Its electrical measurement/source functions allow it to work with common process transmitters:
- mA measurement: −25 to +25 mA and −50 to +50 mA
- Voltage measurement: up to −30 to +30 V depending on range
- 24 V loop power: up to 50 mA
- mA source: 0–25 mA
- Voltage source: 0–16 V
- Pressure-switch testing
- HART / PROFIBUS PA communication
For example, a technician can connect a pressure transmitter, generate a programmed pressure sequence, power the transmitter, measure its 4–20 mA output, and record the calibration results.
What makes the 761A useful
Automated pressure generation is the main feature. Instead of manually operating a hand pump and adjusting a pressure regulator, the operator enters a target pressure and the internal electric pump automatically generates and controls it. Additel specifies control stability as low as 0.003% FS.
The instrument also supports task-based calibration and data logging, allowing calibration procedures to be prepared and results recorded electronically. Additel specifies storage for up to one million time-stamped readings.
Typical applications
Typical uses include:
- Pressure transmitter calibration
- Pressure gauge calibration
- Pressure switch testing
- Differential-pressure instrument calibration
- Process instrumentation maintenance
- HART transmitter commissioning
- Field calibration
- Calibration-laboratory work
- Automated multi-point calibration
- Documentation of calibration results
Kit contents
The exact contents depend on the ordered configuration, but Additel lists standard accessories such as an external pressure manifold, 110/220 V power adapter, rechargeable Li-ion battery, and DP gauge holder with an integrated 80 mL chamber. The pressure modules and fittings need to be considered when specifying the actual kit.
Important: “761A Series Automated Pressure Calibrator Kit” does not uniquely identify the pressure range. For purchasing or comparing quotations, the 761A model suffix and internal pressure-module configuration should be specified.
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