Bahrain tender for supplying and commissioning of transformer oil analyzers
SUPPLYING AND COMMISSIONING OF TRANSFORMER OIL ANALYZERS: DISSOLVED GAS, FURAN & PASSIVATION CONTENTS (Electricity Transmission Directorate)
AUTO SAMPLER
The auto sampler must have highest precision for both large and small injection volumes without changing sample loops with low carryover upgraded for higher pressure, lower volume applications. The system should draw exactly the set volume of sample solution without waste and achieves high reproducibility across the entire range of injection.
The sampler should have short injection cycles for higher productivity through overlapped injections.
The auto sampler should have an injection range of 0.1 – 20 µL with increments in 0.1 µL and better injection precision and accuracy at lower injection volume. The injection sample time should not exceed 25 sec in standard conditions.
The Auto sampler rack should have at least 10 fixed positions for 2 ml vials and two removable trays to test at least 600 samples unattended (identical / non-identical with variable height configuration). The sample handling should be flexible and convenient with different types of sample containers. It must have a facility of temperature control module (4 to 40 Deg C) with auto sampler for thermally liable samples.
The Auto sampler should facilitate fixed-loop injection mode for the absolute lowest delay volume and ultra-fast cycle times. Back flushing of injection needle seat after injection should be automatic to avoid carryover of compounds or blockages caused by direct samples.
The system should communicate with controllers through standard connection protocols with signals for ready, start, stop and shutdown.
The sampler should have safety features such as leak detection, safe leak handling, error detection and display. The auto sampler should include vial plate, 1200 bar injection valve and communication cable with sufficient length.
